Carrier route record
OOPHX→SBP
SkyWest Airlines · Phoenix to San Luis Obispo
- Flights
- 379
- Period
- September 2025 to August 2026
- Share of route
- 31%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on PHX to SBP lands a B+, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 379 flights, with a median arrival 4 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate SkyWest on PHX to SBP from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
77.4%
Arrivals under 15 minutes late, of 372 completed flights
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
0.79%
National rate is 1.89%
Whole route
83.5%
Every carrier on PHX to SBP, 1,240 flights
These figures cover 379 flights between September 2025 and August 2026. Beyond the headline rate, 8.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
SkyWest against every carrier on PHX to SBP
SkyWest flew 379 of the 1,240 flights on PHX to SBP, about 31% of it. Its 77.4% on time is 6 points worse than the route as a whole, which runs 83.5%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from Envoy at 90.2% to SkyWest at 77.4%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Airthin sample | 331 | 90.2% | 50 min | 0.91% | A+ |
| American Airlines | 530 | 83.6% | 96 min | 0.75% | B+ |
| SkyWest Airlines (this page) | 379 | 77.4% | 70 min | 0.79% | B+ |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When SkyWest runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 11 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am49 flights81.6%
- 11am–2pm2 flights—
- 2pm–5pm184 flights81.4%
- 5pm–8pm81 flights70.9%
- 8pm–5am63 flights71.2%
Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 81.6% of the time, against 70.9% for the evening window. That is 11 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 184 flights scheduled in it.
Across the year
SkyWest on PHX to SBP through the year
- Jul–Sep 202526 flights—
- Oct–Dec 202566 flights73.8%
- Jan–Mar 2026106 flights67.3%
- Apr–Jun 2026133 flights85.0%
- Jul–Sep 202648 flights83.3%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 77.4% on time across 379 flights.
SkyWest on PHX to SBP did not run the same all year. Its best quarter was Apr–Jun 2026 at 85.0% on time and its weakest Jan–Mar 2026 at 67.3%, a swing of 18 points on roughly 95 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
Across the week, Tuesday is the strongest day at 92.3% on time and Saturday the weakest at 69.0%, a spread of 23 points.
Arrival by arrival
How late SkyWest on PHX to SBP runs when it is late
The 84 late arrivals split 29 under half an hour, 23 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early91 flights24.5%
- Within 15 min197 flights53.0%
- 15–29 min late29 flights7.8%
- 30–59 min late23 flights6.2%
- 1–2 hours late23 flights6.2%
- 2+ hours late9 flights2.4%
Scale runs 0% to 100%.
Share of 372 completed flights by arrival against schedule.
16 of 91 late departures made up the time and arrived on time, 18% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for SkyWest on PHX to SBP
The latest arrival of the period was on 28 December 2025, 13 hours 58 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 28 December 2025 | 13 hours 58 minutes | Carrier |
| 13 July 2026 | 4 hours 5 minutes | Late-arriving aircraft |
| 20 May 2026 | 3 hours 41 minutes | Carrier |
| 25 May 2026 | 3 hours 29 minutes | Carrier |
| 17 June 2026 | 2 hours 52 minutes | Late-arriving aircraft |
Delay causes
Why SkyWest runs late on this route
Carrier accounts for 64% of the 5,851 delay minutes carriers reported here, and the remaining four split what is left.
- 64%Carrier
- 31%Late-arriving aircraft
- 4%National Airspace System
- 1%Extreme weather
The largest share of delay minutes, 64%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,736 of the 5,851 delay minutes reported here. The split is drawn from 5,851 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 81.6% on time here.
Cancellations are rare at 0.79%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
8.6% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
The 509 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg runs 78.1% on time across 379 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 379 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking SkyWest on PHX to SBP
Put together: treat all of this as provisional. 379 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 77.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 372 completed flights over 12 months sit behind that.
Related
Where to go next
- PHX to SBP, every carrier
- SkyWest on SBP to PHX, the return leg
- Envoy Air on PHX to SBP90.2%
- American Airlines on PHX to SBP83.6%
- SkyWest Airlines network-wide record
- Phoenix Sky Harbor International (PHX) delay statistics
- The best time of day to fly, according to 7.05 million flight records
- Connecting flights: how much buffer the data says you need
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.